Question

A breed of chickens called Silkies has white feathers due to a recessive allele. Leghorns have white feathers due to a dominant allele in a second (different) gene. If true-breeding chickens of both breeds are crossed to each other, what is the expected phenotype of the F1 generation? If members of the F1 generation are mated to each other, what is the expected phenotypic outcome of the F2 ­generation? Assume that the chickens in the parental generation are homozygous for the white allele at one gene and homozygous for the brown allele at the other gene. In subsequent generations, nonwhite birds will be brown.

Answer 1

Answer:the expected phenotype of the F1 would be 100% white and for the F2 the outcome would be 3/16 brown and 13/16 white.

Explanation:Given the parents Silkie homozygous aabb and leghorn homozygous AABB.

The F1 would be 100% White chickens. According to Mendel's law of segregation.

The F2 expected phenotypic outcome would be 3/16 brown chickens and 13/16 white chickens.

Only the recessive chicken for Leghorn gene and dominant or hybrid for the Slkie gene would end up being brown chicken. This is shown in the picture attached.